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Java: document serialization proxy pattern #18480

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smowton merged 1 commit into from
Jan 14, 2025
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Java: document serialization proxy pattern #18480

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4 changes: 3 additions & 1 deletion java/ql/src/Likely Bugs/Serialization/MissingVoidConstructorsOnSerializable.qhelp
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Expand Up @@ -23,7 +23,9 @@ is not the case. The error will be detected at runtime. </p>

</overview>
<recommendation>
<p>Make sure that every non-serializable class that is extended by a serializable class has a no-argument constructor.</p>
<p>Make sure that every non-serializable class that is extended by a serializable class has a no-argument constructor.
Alternatively, consider defining a <code>writeReplace</code> method that replaces the <code>Serializable</code> class instance with
a serialization proxy, so as to avoid direct deserialization of a class whose parent lacks a no-argument constructor.</p>

</recommendation>
<example>
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